666228199 has 8 divisors (see below), whose sum is σ = 819973280. Its totient is φ = 527125536.

The previous prime is 666228191. The next prime is 666228203. The reversal of 666228199 is 991822666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 666228199 - 2³ = 666228191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666228191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3660504 + ... + 3660685.

It is an arithmetic number, because the mean of its divisors is an integer number (102496660).

Almost surely, 2^666228199 is an apocalyptic number.

666228199 is a deficient number, since it is larger than the sum of its proper divisors (153745081).

666228199 is a wasteful number, since it uses less digits than its factorization.

666228199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7321209.

The product of its digits is 559872, while the sum is 49.

The square root of 666228199 is about 25811.3966882848. The cubic root of 666228199 is about 873.3889043396.

The spelling of 666228199 in words is "six hundred sixty-six million, two hundred twenty-eight thousand, one hundred ninety-nine".